hotzenplotz,
It depends what you mean by an AS332. If you mean a AS332-C then there is essentially no difference. If you mean a AS332-L then to my knowledge the only difference is the plug, which makes the airframe longer.
The major differences are mechanical, head, gearbox, engines etc...
If you mean an AS332-L2 then there is a difference. The intermediate structure on the L2 is completely different. It is Composite for a start, and is just short of a metre longer than on the previous 332's. Also the tailboom is just under half a metre shorter than the 332L's.
Sorry to ramble, but structurally that's all I've got!
Hope that goes someway to helping
"Mad as a mooing fish"